Ethereal Blooms are plants that are crafted from Shimmerleaf in a Crucible or Thaumatorium

Ethereal Blooms are used to revert areas that have become tainted or eerie biomes back to their original biome. A bloom affects a 9x9 area centered on itself. The bloom also glows in the dark. The light level is not high enough to prevent monster spawning, but make them easy to find during night.